Sofa



FIG. 1 is a perspective view of a sofa showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof, the left side being a mirror image thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a top plan view thereof.

FIGS. 2 through 5 have been shown on a reduced scale with respect to FIG. 1. 

The ornamental design for a sofa, as shown and described. 